{"id":"CVE-2026-71429","summary":"stream-json: pick/ignore/filter/replace filters are O(depth²) on nested input — small crafted JSON blocks the event loop for seconds→minutes (DoS)","details":"stream-json is a micro-library of stream components for processing JSON and JSONC with a minimal memory footprint. Prior to 3.5.0, the path filters pick, ignore, filter, and replace in src/core/filters/filter-base.js recompute the full path string from the nesting stack for every checkable token. Because the stack length equals the current nesting depth and a checkable token is emitted at every level, a depth D document costs O(D²) rather than O(D) to process. The issue is triggered by nesting depth rather than byte volume, including the documented pick({filter: 'data'}) traversal-until-match path, so an application that sends untrusted JSON through a string or RegExp filter can block the Node.js event loop and cause denial of service with a small deeply nested document. The streamArray, streamObject, and streamValues streamers are not affected because they use the constant-time asm.depth getter. This issue is fixed in version 3.5.0.","aliases":["GHSA-528h-pc64-c93x"],"modified":"2026-09-06T03:30:55.437004725Z","published":"2026-09-03T20:15:19.721Z","related":["CGA-f293-4xjv-p63g"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-407"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71429.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71429.json"},{"type":"ADVISORY","url":"https://github.com/uhop/stream-json/security/advisories/GHSA-528h-pc64-c93x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71429"},{"type":"FIX","url":"https://github.com/uhop/stream-json/commit/a869fb98aaef9225556f49901a8f55954ff856e6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/uhop/stream-json","events":[{"introduced":"0"},{"fixed":"a869fb98aaef9225556f49901a8f55954ff856e6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.5.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["3.4.0","3.3.0","3.2.0","3.1.0","3.0.0","2.1.0","2.0.0","1.9.0","1.8.0","1.7.5","1.7.4","1.7.3","1.7.2","1.7.1","1.7.0","1.6.1","1.6.0","1.5.0","1.4.1","1.4.0","1.3.3","1.3.2","1.3.1","1.3.0","1.2.1","1.2.0","1.1.4","1.1.3","1.1.2","1.1.1","1.1.0","1.0.3","1.0.2","1.0.1","1.0.0","0.6.1","0.6.0","0.5.3","0.5.2","0.5.1","0.5.0","0.4.2","0.4.1","0.3.0","0.2.2","0.2.1","0.2.0","0.1.0","0.0.5","0.0.4","0.0.3","0.0.2","0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71429.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}